Improved fire-proof building



EDWIN MAL on INDIANAPOLI s, INDIA NA.4

- f- :team Patent Nasafzsz, dmc Ma/J 4, 1869. f

IrMPRovnD CI-mnlpnoor- BUILDING.

` The'chedule referred to in `these Letters Patent and making part of the same. n f

To all when l'it notice/rn: i y n Be itknown that I, EDWIN MAY,- of Indianapolis,

in the county `Iof Marion, and State of 'Indianafhave' invented a new and useful Improvement in Fire-Proof-v ing'Grain-Elevators, Manufactories, and Workshops;4

`and I dofhereby declare that `the following is a full,

clear, and exact description thereof, that will n enable `skilled artisans' to make and use it, reference being had to the accompanyingldrawings, fand to the letters l f of reference marked thereon, making part of this speci- Iiication.

This invention consists, first, in the mode of applying segmentalarches of thin sheet-metal to'be suspended to theV upper edge `of the floor-joists, arching over` the space vbetween them, and arranged to carryV the least practicable sniiicient quantity of non-con` ducting or dre-proofing material to be laid thereon, to

cover andencase theupper edges of the joists in such a manner as to prevent their'gnition at the top Vby the burning ofthe liooring-boards and upper part'of the building, and at the same time to admit of the oorilng- ,boards being laid thereon and nailed to the joists without disarranging the intervening fire-proofing maf terial; and itfurther consists in the 'novel form of the sheet-metal arch' and rib-moulding suspended to the under edge ofthe loor-joist 'forming the ceiling, 'more easily and cheaper than lath, as the space over the arch isilled with coarse mortar, or other cheap fire-proof ing material, completely encasing. the joist, and pre.- 'senting to the view from` the' door a surface of sheet- `metallinstead of the "exposed plastered surface of a ceiling, when constructed `in the usual manner with 'lath and plaster, and such ceilings are so'liable to becomelinjnred and broken ofthat the use of them in elevators, manufacto'ries, and workshops, is in most cases dispensedwvith, andthe lower edge and sides of the joist are left exposed to view, and the danger Iof fire.

The inventionstill further consists in the peculiar `construction of a cast-iron clamp or furring-oi` stud, which is made to hold the arch of' sheetsm'etal oli' the wooden oor-joist, and may be easily and conveniently attached to the underedgerof the joist.

Figure l is a section of flooring and ceiling with my improvements applied thereto. y y Figures' 2 and 3, are detail views of my improvement in constructing the furring-off stud or clamp.

Similar letters of refereneeindicate corresponding parts in the `several gures.

A are `the wooden joists.` I B, lfurring-stud' or clamp. .l tv y I O,sheet-meta1 segmental arch and rib-moulding. D, nails fastening the arch C to woodenjoist. E, `segmental varch of sheet-metal.

I F, space lled with fire-proong material.

l `H, lnails't'fhrough the filling into the joist,

I, lling .of-plaster or fire-proofing material.

J, end view of fnrring-stud or clampB.

The fui-ring-studs or clamps B are placed in position and spaced loli on the lower edge ofthe joist,'and can easily be fastened by wedgng where thej joists may be too thin, `or trimming oho the joists where lthey are too thickl- The sheet-m`etal arches G are formed with the round ormould on the edges, that they may present anniform appearance, and at the same time turn the edges of the sheet-metal arch which join to and against each other into the shade, making a perfect finish of the two edges. l

' They are also formed in a manner to leave a space in the haunches and aroundthe lower edge of th'e joists,

so as to receive and contain the greatest quantity of the .iire-.proongmatexial against the sides and about the lower edge of the joiststhe betterto protect them against excessive heat.

After securing the arch-plates C in position'by the n nailsD, or screws, through the furring-stud or clamp B, into the wooden joist, the fire-proofing material I is is filled in and levelled by the edges of the arch-plates, f and after it becomes suliiciently dry, the licor is laid down and nailed to the joists vthrough the illing F. In, this manner the'u'pper edges and sides of the joists will be completely covered and encased by the lireproong material; This manner of ire-prooling also subserves the same purpose as the ordinary deafening in general use, and at the same time serves to stilien the floor-joists. What I claim as new, and desire to secure by Letters 1.` The furring'or clamp B, to seize overthe lower edge of the joists, and hold the metal arch O, when constructed and arranged substantially as herein described.- n

f 2. In combination with Ythe above, the sheet-metal arch O and fastenings D, when arranged and constructed substantially 'as herein described.

EDWIN MAY. o' Witnesses:` p

WM. SULLIVAN, D; P. Hurcnmson'.

A* tuitrd j 'tatrtatwt @Wina 

